org.sourcepit.tools.shared.resources.harness.SharedResourcesCopier.java Source code

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Here is the source code for org.sourcepit.tools.shared.resources.harness.SharedResourcesCopier.java

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/*
 * Copyright 2014 Bernd Vogt and others.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sourcepit.tools.shared.resources.harness;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Enumeration;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.jar.Manifest;

import org.apache.commons.io.IOUtils;
import org.sourcepit.tools.shared.resources.internal.harness.IFilterStrategy;
import org.sourcepit.tools.shared.resources.internal.harness.IFilteredCopier;
import org.sourcepit.tools.shared.resources.internal.harness.SharedResourcesUtils;

public class SharedResourcesCopier extends AbstractPropertyInterpolator {
    private String manifestHeader = "Shared-Resources";

    private ClassLoader classLoader = Thread.currentThread().getContextClassLoader();

    private boolean filter = false;

    private IFilterStrategy filterStrategy;

    public boolean isFilter() {
        return filter;
    }

    public IFilterStrategy getFilterStrategy() {
        if (this.filterStrategy == null) {
            this.filterStrategy = IFilterStrategy.TRUE;
        }
        return filterStrategy;
    }

    public void setFilterStrategy(IFilterStrategy filterStrategy) {
        this.filterStrategy = filterStrategy;
    }

    public void setFilter(boolean filter) {
        this.filter = filter;
    }

    public void setClassLoader(ClassLoader classLoader) {
        this.classLoader = classLoader;
    }

    public ClassLoader getClassLoader() {
        return classLoader;
    }

    public void setManifestHeader(String manifestHeader) {
        this.manifestHeader = manifestHeader;
    }

    public String getManifestHeader() {
        return manifestHeader;
    }

    public void copy(String resourcePath, File targetDir) throws IOException {
        final Collection<String> resourceLocations = new LinkedHashSet<String>();

        final Enumeration<URL> resources = classLoader.getResources("META-INF/MANIFEST.MF");
        while (resources.hasMoreElements()) {
            final InputStream inputStream = resources.nextElement().openStream();
            try {
                final String _resourceLocations = new Manifest(inputStream).getMainAttributes()
                        .getValue(manifestHeader);
                if (_resourceLocations != null) {
                    for (String resourceLocation : _resourceLocations.split(",")) {
                        resourceLocations.add(resourceLocation.trim());
                    }
                }
            } finally {
                IOUtils.closeQuietly(inputStream);
            }
        }

        final IFilteredCopier copier = isFilter() ? newCopier() : null;

        final List<IOException> ioException = new ArrayList<IOException>();

        for (String resourceLocation : resourceLocations) {
            try {
                SharedResourcesUtils.copy(classLoader, resourceLocation, resourcePath, targetDir, false, copier,
                        getFilterStrategy());
                return;
            } catch (IOException e) {
                ioException.add(e);
            }
        }

        if (!ioException.isEmpty()) {
            throw ioException.get(0);
        }

        throw new FileNotFoundException(resourcePath);
    }
}